Hot-blast valve.



No. 843,935. PATENTED PEB.12, 190v.

E.FARGO. HOT BLAST VALVE.

APPLICATION FILED APR-17,1906;

3 SHEETS-SHEET 1.

WITNESSE$ INVENTOR W0 zm y 6 No. 843,935. PATENTED FEB. 12, 1907. E. FARGO.

HOT BLAST VALVE.

PATBNTED FEB. 12, 1907.

E. FARGO.

HOT BLAST VALVE.

APPLIOATION FILED APR.17,1906.

a SHEETS-SHEET a.

INVENTOR UNIT D STATES PATENT. OFFICE. EDWIN FARGO, OF WASHINGTON, PENNSYLVANIA.

. HOT-BLAST VALVE;

Specification of Letters Patent.

Patented Feb. 12, 1907.

Application filed April 17, 1906. Serial No. 312,073.

To (tlZ whom it may concern.

Be it known that I, EDWIN FARGO, a citizen of the United States, residing at Washington, in the county of 'W ashington and State of Pennsylvania, have invented certain new and useful Improvements in Furnace Apparatus, of which the following is a specification.

The invention relates to regenerator furnace apparatus, and has for its objects to provide a controlling means for the admission of air and the outflow of the products of combustion adapted to prevent any leakage; to provide a controlling means whereby the escape of air or gas direct to the stack is revented during the reversal of the contro ing means; to provide a valve for the admission of gas wherein all burning of the gas at the valve, and consequent overheating and warping thereof is avoided, and finally, to provide a valve positive in its action and so arranged as to be operable by the workman from a position distant from the valve. The invention is illustrated in its preferred form in the accompanying drawings, in which Figure 1 is a plan view of the controlling means or valve, which construction is used preferably where natural gas is used;

Figure 2 is a transverse section through the center of the valve shown in Figure 1 Figure 3 is a plan view of a double valve, which valve is used where artificial gas is used in place of natural gas; 1

Figure 4 is a diagrammatic plan view showing the construction of the furnace when provided with the double valve, and

Figure 5 is a transverse section through the furnace on the line (V)-(V) of Figure 4, the controlling valve being shown however, in end elevation instead of section.

The invention which resides in the controlling means shown in detail in Figures 1, 2 an 3, 1s intended to be used in connection with the ordinary and well-known Siemens regenerator furnace shown in Figures 4 and 5 of the drawing. This furnace is of the ordinary type, but will be briefly described in order to make clear the application of my con trolling means. As shown in Figures 4 and 5, A, B, C, and D, are the regenerators which are placed below the combustion chamber E, and have connection with such chamber, at their tops, and are connected at their bottoms or ends with the passages 6, 7, 8, and 9, which passages lead to the stack passage 10,

connected at its outer end with the stack The controlling means or double valve G 1s interposed in these passages, and controls the flow of air, gas, and the outgoing products of ing 12, passes through the valve to the passage- 7, thence through the regenerator B to the combustion chamber E. The products of combustion then pass through the regenerators O and D, passages 8 and 9, the valve G, and the stack passage 10. When the valves are reversed, the flow of gas and air is of course, reversed, and the gas is carried through the passage 9, regenerator furnace C, and combustion chamber E. The products of combustion then pass through the regenerators A and B passages 6 and 7, the valve, and the passage 10. The air is carried through the assage 8, regenerator D, and combustion c amber E. The products of combustion then pass through the regenerators A and B, passages 6 and 7, the valve and the passage 10. The valves are rovided with connecting gearing operated y a sprocket chain 13 and sprocket 14, whereby the air and gas may be reversed simultaneously from a position adjacent the operators bench. The general arrangement of the parts now having been thus described, description will now be made of the controlling means Gin which the invention resides.

In Figure 3 a plan view of the double valve adapted for use with artificial gas is shown, and in Figure, 2 a transverse section is shown, which although taken through Figure 1, applies, with the exception of the element of gearing, to each of the valves shown in Figure 3. These valves, the one for the admission of gas and the other for the admission of air, are identical in construction, so that a description for one will suffice for both. As shown in Figure 2, each of these valve comprises a casing 14 provided at its ends with manholes 15, and on its lower side with the openings 16, 17, and 18. The openings 16 and 18 lead to the regenerator passages, while the opening 17 leads to the stack.

The casing is also provided 'on'itsjupper side with a flanged admission casing 19'prov1ded with a race 20 constituting the lower member:

of a ball bearing. --Seated transversely of the admission casing 19 and the opening 17 is the rotary valve member 21 for controlling the direction of flow. This transverse valve comprises a cylindrical member having a pair of perforations 22 and 23 1n line with each other and adapted to connect the interior of the cylindrical member 21 with either side of the passage inthe casing 14,

and also to connect either side of such pas- .sage' in the casing 14 with the opening 17 which leads to the stack. Extending obliquely of the cylindrical member 21 is a partition' wall 24 which extends from the lower a. side of the opening 22 to the upper side of the opening 23.

, valve is the one roradinitting air, the air passes down through the member 21, opening 22, and opening 16, from which the air circulates through the regenerators and furnace, and returns to the opening 18, after 3 which it passes through the opening 17 to the stack. Now if the valve is revolved 180 the opening 22 will connect the right hand side of the casing 14 with the passage 21, while the left hand side of the casing 14 will be connected with the opening 17. When in vthis position the direction of how through the regeneratorsand furnace is reversed. When the valve constitutes the gas control the operation is of course substantially the same. It will .be seen that by virtue of the contacting cylindrical surfaces my valve is abs0 lutely tight, and that there is no leakage as in the case of the old butterfly valve, which is pivoted on a horizontal axis in the man-v ner of a damper. 1t will also be seen that in my .valve thereis never any direct connection between the admission passage and the passage 17 to the stack curing the reversal of the valve. This is not the case in the butterfly valve, as when such valve occupies its 1ntermediate or vertical POSltlOIl the fluid admittei instead of going through the regenerator passages goes straight through to the stack. This is a small matter for the air ad- IILSSlOIl, but for the gas admission such loss caused by' direct leakage to the stack is an important matter. 1t has been remeiied with the butterfly valve heretofore by using an additional valve in the stack which (301114 be closeiouring the reversal of the butterfly valve, but it will be seen that my single valve accomplishes the desired, function without any. additionalcloslng means ,for the stack.

. mounted upon the shaft :11. llLS shaft car- It willalso 'be seeni'rom inspection of'Fig. 2 that when gas is bemg admitted through the passage 21 and openings 22 and 16, that the not products of combustion from the fur naces are passing adjacent to the part1tion24.

, 7 -W 1th the old Iorm or butterfly valve a slight leakage always occurred ad acent the valve,

and the gas burned around the edges of the valve thereby overheating the valvejand the means whereby the gears .for operating the rotary valve are connected. 'l'he gears for operating the rotary valves, which gears correspond to the gear 27 of l igure 2, are mounted upon a shaft 28, which shaft carries a bevel gear 29 engaging the gear 30 a 9 ries a sprocket 32, winch sprocket, as moicated in li'igure 4, is connected to the sprocket 14 by means of the sprocket chain 13, thereby ali'ordmg means for operating the two valves simultaneously from a position adjacent the operators bench.

When the single valve shown in Figure 1. is used. the construction of .l igure 4 is modified so that there are only two regenerators, asA

and l), and the gas, which s in this case natural, is admitted directly to the combustion chamber E. The operation and constructlon of this single valve is substantially the same as that for the air admission hall' of the double valve heretofore described, with the exception that the sprocket 33 is mounted directly upon the shaft 34 which carries the gear 2 Z. in order to protect the gearing and bearings from dust and contact with the gases 1 prov de in both the double and single I 10 valve a casing 25, which fits down over the admission casing in the manner indicated in the drawing.

Having thus described my invention and illustrated its use, what I claim as new, and 1 15 desire to secure by Letters Patent, is the following:

1. In combination in regenerator apparatus, a casing having a transverse passage enlarged at its top and provided with a shoul- 12o oer, a tubular perforated valve member iitting therein and provided with a projecting annulus fitting the enlarged portion of the casing and comprising a bevel gear on the upper side and a bearing on the lower side seated rotatively on the shoulcer, a power shaft j ourhaled in the enlarged portion of the casing and carryinga beveled gear for driving the gear on the annulus, and a protective casing resting upon the top of the valve cas- I 3 ing and upon the top of the valve whereby a tight joint is provided and the gears and bearings protectedi 2. In combination in regenerator apparatus, a casing having a transverse passage enlargeiat its top and proviclecl with a shoulder, a tubular perforated valve member fitting therein and provided with a projecting annulus fitting the enlarged portion of the casing and comprising a bevel gear on the upper side and a bearing on the lower side resting rotatively upon the shoulfer, interposed antifriction balls, a power shaft journalecl in the enlarged portion of the casing and carrying a beveled gear for driving the gear. on the annulus and a removable protective casing resting u on the to of the valve casing and upon t e top of t e valve whereby a tight joint 'is provided and the gears and bearings rotected.

In testimony w ereof I have hereunto signed my name in the presence of the two subscribed witnesses.

EDWIN FARGO.

Witnesses J. C. BRADLEY, F. E. GAITHER. 

